你可能感興趣的試題

Application A currently holds an exclusive lock on a single row and application B tries to access that row. If lock timeout is set to -1 and both applications are using isolation level RS, which of the following will occur?（）

A.Applications A and B will cause a deadlock situation
B.Application B will read the previous version of the row
C.Application B will read the row and see uncommitted changes made by application A
D.Application B will be placed in a lock-wait state until application A releases its lock

單項選擇題

How does DB2 protect the integrity of indexes when data is updated?（）

A.Locks are acquired on the data.
B.Locks are acquired on index keys.
C.Locks are acquired on index pages.
D.Locks are acquired on index pointers.